New tests of blood and spinal fluid can show how far Alzheimer's has progressed and how fast a patient's memory will decline.

SpaceX launched four people into space Monday evening on a first-ever human mission to orbit Earth's polar regions. If successful, the mission also will be the first to cultivate mushrooms as a crop.

Dr. Jean Kaseya is now figuring out how to cope with the new foreign aid landscape.

Health care price transparency is one of the few bipartisan issues in Washington, D.C. But much of the information is not helpful to patients, and there's no evidence that it's lowering costs.

NPR's Emily Kwong speaks with clinical social worker Marie Clouqueur on what it's like to be a solo caregiver and how to navigate the challenges.

The U.N. has identified Kabwe, a city of almost 300,000 people in Zambia, as one of the most polluted places on the planet. Who is to blame? And can justice be done?

Vaccine hesitancy has been growing in the U.S. in recent years. But as Texas measles cases rise and other states also report outbreaks, some parents want their kids to get their shots early.

The FDA's top vaccine regulator says he was forced out by the Trump administration and criticizes HHS Secretary Robert F. Kennedy Jr.'s "misinformation and lies" about vaccines.

For people with gambling disorder, the proliferation of gambling opportunities makes it difficult to fight their addiction. Investment in treatment lags behind other addiction disorders.

American scientists have long worked abroad, but recruitment efforts are increasing due to cuts by the Trump administration.